Electrochemical reduction of bromate using noble metal-free nanoscale zero-valent iron immobilized activated carbon fiber electrode

Yao, Fubing; Yang, Qi; Sun, Jian; Chen, Fei; Zhong, Yu; Yin, Huanyu; He, Li; Tao, Ziletao; Pi, Zhoujie; Wang, Dongbo; Li, Xiaoming

doi:10.1016/j.cej.2019.123588

Cited by 37 publications

(15 citation statements)

References 45 publications

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“…XRD patterns of ACFs in Figure D show that two major diffraction peaks appear in the ACF sample at 23 and 43°. Compared with HKL-ACF, the graphite microcrystalline grains of ACFs were larger and more compact . The 2θ value near 23° increased gradually with the increase of SiO 2 , indicating that the layer spacing of a graphitized structure decreased with the increase of the addition amount, and the grain became more compact, which can also be seen in Table .…”

Section: Results and Discussionmentioning

confidence: 61%

“…Compared with HKL-ACF, the graphite microcrystalline grains of ACFs were larger and more compact. 27 The 2θ value near 23°increased gradually with the increase of SiO 2 , indicating that the layer spacing of a graphitized structure decreased with the increase of the addition amount, and the grain became more compact, which can also be seen in Table 2. This indicates that nano-SiO 2 is beneficial to form crystal, but when the amount of nano-SiO 2 is too high, it will occupy a certain space and affect the formation of grains.…”

Section: Resultsmentioning

confidence: 69%

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Melt Spinning of Low-Cost Activated Carbon Fiber with a Tunable Pore Structure for High-Performance Flexible Supercapacitors

Qian-qian

Yin

et al. 2020

ACS Appl. Energy Mater.

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Activated carbon fibers are emerging as one of the most promising electrode for flexible supercapacitors, as they are highly conductive, lightweight, and flexible. However, the high preparation cost and unreasonable pore structure limit their practical application in supercapacitors. Here, we developed a cost effective and green method to fabricate activated carbon fiber with a controllable porous structure by employing Kraft hardwood lignin extracted from black liquor of papermaking as raw material and nano-SiO2 as hard template. The introduction of nano-SiO2 can not only form mesoporous in the fiber but also improve the graphitization degree and hydrophilicity of the fiber. The fabricated fiber with large specific surface area, appropriate pore structure, high conductivity, and strength can act as a superior electrode for flexible supercapacitors in terms of high specific capacitance, high energy and power density, outstanding rate capability, as well as good mechanical stability.

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Section: Results and Discussionmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 69%

Melt Spinning of Low-Cost Activated Carbon Fiber with a Tunable Pore Structure for High-Performance Flexible Supercapacitors

Qian-qian

Yin

et al. 2020

ACS Appl. Energy Mater.

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“…As is the case for catalyst loading, a reaction will have an optimal operating cathode potential above which the abundance of hydrogen bubbles produced could inhibit adsorption of contaminants. , Electrochemical reduction is also sensitive to the quality and characteristics of the feed, which influence performance and electrode lifetime . Performance typically improves at lower pH (due to increased formation of adsorbed hydrogen), , at higher ionic strength (due to smaller EDLs), and in the absence of certain species (e.g., organic matter, electrocatalyst poisons, competing ions). , …”

Section: Electrochemical Transformationsmentioning

confidence: 99%

“…265,266 Electrochemical reduction is also sensitive to the quality and characteristics of the feed, which influence performance and electrode lifetime. 98 Performance typically improves at lower pH (due to increased formation of adsorbed hydrogen), 267,268 at higher ionic strength (due to smaller EDLs), 98 and in the absence of certain species (e.g., organic matter, electrocatalyst poisons, competing ions). 264,269 The choice of electrode is another critical design parameter that influences the mechanism of electrochemical reduction, as it impacts the reaction pathway, selectivity, and energy consumption.…”

Section: Electrochemical Reductionmentioning

confidence: 99%

Electrochemical Methods for Water Purification, Ion Separations, and Energy Conversion

et al. 2022

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Agricultural development, extensive industrialization, and rapid growth of the global population have inadvertently been accompanied by environmental pollution. Water pollution is exacerbated by the decreasing ability of traditional treatment methods to comply with tightening environmental standards. This review provides a comprehensive description of the principles and applications of electrochemical methods for water purification, ion separations, and energy conversion. Electrochemical methods have attractive features such as compact size, chemical selectivity, broad applicability, and reduced generation of secondary waste. Perhaps the greatest advantage of electrochemical methods, however, is that they remove contaminants directly from the water, while other technologies extract the water from the contaminants, which enables efficient removal of trace pollutants. The review begins with an overview of conventional electrochemical methods, which drive chemical or physical transformations via Faradaic reactions at electrodes, and proceeds to a detailed examination of the two primary mechanisms by which contaminants are separated in nondestructive electrochemical processes, namely electrokinetics and electrosorption. In these sections, special attention is given to emerging methods, such as shock electrodialysis and Faradaic electrosorption. Given the importance of generating clean, renewable energy, which may sometimes be combined with water purification, the review also discusses inverse methods of electrochemical energy conversion based on reverse electrosorption, electrowetting, and electrokinetic phenomena. The review concludes with a discussion of technology comparisons, remaining challenges, and potential innovations for the field such as process intensification and technoeconomic optimization.

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“…22 Metal-free electrodes NZVI/ACF with different iron loadings were also prepared by the conventional impregnation method and their electrocatalytic bromine reduction performance was investigated in a two-chamber electrochemical reactor. 20 The application of weak magnetic elds (WMF) or pre-magnetization can promote the corrosion of Fe 0 and accelerate the removal of heavy metals and organic contaminants. [23][24][25][26] The improvement of contaminants removal from Fe 0 induced by WMF may be mainly attributed to the Lorentz force, while the magnetic eld gradient force can stimulate the continuous corrosion of Fe 0 .…”

Section: Introductionmentioning

confidence: 99%

High-efficiency removal of tetracycline from water by electrolysis-assisted NZVI: mechanism of electron transfer and redox of iron

Wang

Lynch

2023

RSC Adv.

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Electrochemical reduction of bromate using noble metal-free nanoscale zero-valent iron immobilized activated carbon fiber electrode

Cited by 37 publications

References 45 publications

Melt Spinning of Low-Cost Activated Carbon Fiber with a Tunable Pore Structure for High-Performance Flexible Supercapacitors

Melt Spinning of Low-Cost Activated Carbon Fiber with a Tunable Pore Structure for High-Performance Flexible Supercapacitors

Electrochemical Methods for Water Purification, Ion Separations, and Energy Conversion

High-efficiency removal of tetracycline from water by electrolysis-assisted NZVI: mechanism of electron transfer and redox of iron

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